all thoughts welcome
about two months ago the x stepper on my triac died, got a new one. well last night my brand new 2 month old stepper died.
im aware steppers are pretty hard to kill, anyone got any suggestions? could it be the x parker sd2 drive card causing this?
CNC Guru
I would check the wires from the motor. Look for fraying which would cause a phase to short to ground.
CNC Guru
is the stepper getting hot (too much current).
Check the connection box is not full of coolant (more likely to cause the drive to fail).
Do you have the tension on the belt too tight.
Is the stepper full of coolant.
Check the connection box is not full of coolant (more likely to cause the drive to fail).
Do you have the tension on the belt too tight.
Is the stepper full of coolant.
CNC Expert
ok wiring is fine, it is a brand new stepper soMartin wrote:I would check the wires from the motor. Look for fraying which would cause a phase to short to ground.
CNC Expert
stepper was an exact match for the original one that came with it tom and didn't notice any heat issues.angel-tech wrote:is the stepper getting hot (too much current).
Check the connection box is not full of coolant (more likely to cause the drive to fail).
Do you have the tension on the belt too tight.
Is the stepper full of coolant.
connection box is perfectly dry and stepper is completely dry.
now like the original stepper its an 8 coil stepper. so only 4 were wired in, just wired in the other 4 coils from the stepper that weren't being used and it works perfect. so it would seem 4 dead coils and 4 working coils.
this is an odd one
changed x and y drive cards over for a 5min test and both seemed fine
CNC Guru
I don't think you should have wired it so that 4 coils were not used, the coils are usually wired in series or parallel, but i'm pretty sure they're all used.
CNC Expert
they weren't all used on the original stepper we checkedangel-tech wrote:I don't think you should have wired it so that 4 coils were not used, the coils are usually wired in series or parallel, but i'm pretty sure they're all used.
I still have it to be fair
CNC Expert
But the eexisting stepper that came from denford only had 4 coils wired not all 8
CNC Guru
maybe Martin can shed some light, I would have thought all 8 coils would be wired in to the 4 wires. Maybe you thought the linked coils were just wires not connected. Did you measure the resistance across the coils.
CNC Expert
yep we measured all 4 of the not connected one and they were not connected to the machine.
CNC Guru
It does sound strange. I Don't see why we would have left 4 wires seperate.
CNC Expert
nope 4 unused wires not connected and each had heat shrink wrap on them
will dig the original stepper out when i get home from work and post some photos
will dig the original stepper out when i get home from work and post some photos
CNC Expert
here are, original stepper
as you can see only 4 connected, ignore the white connector we were using that for testing purposes. but as you can see other four have been cut real short and they were covered in heat shrink wrap to stop them shorting etc...
as you can see only 4 connected, ignore the white connector we were using that for testing purposes. but as you can see other four have been cut real short and they were covered in heat shrink wrap to stop them shorting etc...
CNC Guru
it's normal to have the other four wires short and heatshrunk, but they're normally connected together in pairs, as they're the centre taps of both coils, or end and start of A- A+ and B- B+ coils.